Faraday rotation in an InP waveguide
Waveguide Faraday rotation was demonstrated in an InP waveguide with magnetic dopants. The modal Verdet coefficient was 10 ° ∕ mm T at a wavelength of 1.55 μ m . It was found that the Verdet coefficient of the Fe : In 1 − x Ga x As y P 1 − y ( x = 0.290 , y = 0.628 ) core was 12.5 ° ∕ mm T at a wave...
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| Veröffentlicht in: | Applied physics letters 2007-01, Vol.90 (2), p.023514-023514-3 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Waveguide Faraday rotation was demonstrated in an InP waveguide with magnetic dopants. The modal Verdet coefficient was
10
°
∕
mm
T
at a wavelength of
1.55
μ
m
. It was found that the Verdet coefficient of the
Fe
:
In
1
−
x
Ga
x
As
y
P
1
−
y
(
x
=
0.290
,
y
=
0.628
) core was
12.5
°
∕
mm
T
at a wavelength of
1.55
μ
m
. The Verdet coefficient dependence on wavelength is in agreement with theory. The loss of the waveguide was
4.34
dB
∕
cm
, giving a magneto-optic figure of merit of 23 at a magnetic field of
1
T
and a wavelength of
1.55
μ
m
. This semiconductor waveguide shows promise for monolithically integrated optical isolators. |
|---|---|
| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.2430931 |